... classes of machine parts to quenching,anneal weld and with HF induction hardening device contain four types (Medium frequency,High ... heating,braze welding,smelting, other field and with CEpredominance as belows: 1.The induction heating equipment mains circuit adopts Siemens ... IGBT,MOSFET and any other new type induction heating machine. 2.Fast speed,low power consumption,small volume, ...